Hackers are spreading a nasty computer virus named Kamasutra .The victim gets an email that promices PowerPoint presentation of sexual positions from the Kama Sutra.

"Be careful what you do with that mouse," quips Graham Cluley from Sophos a San Francisco based security firm.

"When you click on the file you do get to see a real PowerPoint presentation, but in the background a backdoor Trojan called Troj/Bckdr-RFM is installed which allows hackers to gain remote access to your computer."

Once a computer is infected with the malicious software, the hacker can steal personal information and spy on users' activities or use the machine for nefarious deeds such as sending spam or attacking websites.

In scant consolation, the booby-trapped file did present slides of more than a half dozen lovemaking techniques illustrated from the ancient Indian text, Cluley said.